Turnover for molding machines



Feb. 9, 1932.

Filed NOV. 24, 1930 W. J. FIEGEL TURNOVER FOR MOLDING MACHINES 4 Sheets-Sheet l Feb. 9, 1932. w. J. FIEGEL.

TURNOVER FOR MOLDING MACHINES Filed Nov. 24, 1950 4 Sheets-Sheet 2 Feb. 9, 1932. W, J. FIEGEL 1,844,466

TURNOVER FOR MOLDING MACHINES Filed Nov. 24, 1930 4 Sheets-Shea?I 5 A TTORNEYS "eb, 9, 1932. w. J, FIEGEL 1,844,466

TURNOVER FOR MOLDING MACHINES Filed Nov. 24, 1930 4 Sheets-Sheet 4 mg BY Waal. #uw

A TTORNEYS'- M 1; wl 'I I www4 Patented Feb. 9, 1932 UNITED STATES PATENT OFFICE y WILLIAM J. FIEGEL, F DETROIT, MICHIGAN, ASSIGNOR TO BOI-IN ALUMINUM & BRASS CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN TURNOVER FOR HOLDING MACHINES Application lefl November 24, 1930.

lhis invention relates to molding machines and has as one of its objects to reduce the manual eilort required in operating machines oi' this type to a minimum.

The invention contemplates accomplishing the above result by providing mechanical means for automatically raising the mold 'from its support to permit rotating the saine to position the pattern uppermost Where it may be conveniently grasped` and removed 4from the mold prior to the pouring operation.

The foregoingl as well as other objects will be made more apparent as this description proceeds, especially when considered in connection with the accompanying drawings, wherein z Figure 1 is an elevation of a molding machine constructed in accordance with this invention g Figure 2 is a side elevational view of the machine illustrated in Figure 1 with certain parts brohcn away for the salie of clearness;`

Figure 3 is a view similar to Figure 2 showing' the parts of the molding machine in a il iilerent position Figure i is a fragmentary side elevational view oi the machine illustrating the parts thereof in still another position; and

Figure 5 is a sectional View taken substantially on the line of Figure 1.

,For the purpose et illustration, I have shown this invention applied to a molding machine similar in basic principle to the machine illustrated in my Patent No. 1,699,- 120-:1 issued November 2()` 19:28. The addition or impl-(nement in the machine illustrated in the aforesaid patent and constituting the subject mattei' of this invention comprises generally means for automatically raising the mold after the ramming operation from its support to a position where it may be readily rotated throughout 180 degrees 'for placing the pattern therein uppermost to permit the same to be withdrawn from the mold.

l'fn order to facilitate an understanding' of the present invention, the molding machine and operation thereof will now be briefly described As shown particularly in Figure 1, the molding machine comprises a base Serial No. 497,933.

supporting a. housing l1 within which aram l? is mounted for reciprocation in a direction substantially perpendicular to the horizontal. The ram 12 is preferably operated by air pressure admitted to the housing 11 below the ram 1Q by suitable valve means not 4shown he; in. The arrangement is such that the admission ot air into the housing 11 below the ram 12 builds up a pressure sufficient to raise the ram and the escape of air from the housing 11 causes the ram to descend at a speed in accordance with the rate oi escape oi the air. Supported upon the topof the ram 19 is a pattern supporting plate 13 adapted to cooperate with a squeezer plate 14 to clamp the mold therebetween when the parts are in the position illustrated in Figure 4. The squeezer plate 14 is carried by a f ame member 15 which in turn is secured at the opposite ends thereof to a pair of side frame members 1G pivotally connected at the lower ends thereof upon opposite'sides of the base ,of the machine as indicated by the reference character 17.

Supported upon the frame member 15 above .he squeezer plate 1-1 is a vertically aol-,

yini-table cross head 18 carrying` adjacent the opposite ends thereof a pair of mold part-enpaoing elements 19. he mold part-engaging' elements 19 are substantially U-shaped in cross section and are ioclrably mounted for swinging` movement about a horizontal axis so that the lower loop ends of the elements may be engaged with the ears projectingl laterally outwardly from opposite sides of the pattern plate 21.

Referring now to the operation of the molding machine as thus far described and assuming' that the swinging frame members 16 und 'their associated parts are in the position shown in Figure 2 and the ram 12 is in its lowerinost position as also shown in this figure. in the above positions, a pattern plate 21 is placed upon the plate 13 and a flask 22 is placed upon the pattern plate 21. Then the pattern plate and flask are properly positioned as specified above, sand or other suit-` able molding' material. is inserted Within the flash around the pattern and the parts are Vhen the parts of the machine are (l tlagitated by a suitable air operated vibrator 23. Sufficient sand is placed within the flask to bring the top surface thereof substantially above the upper edge portions of the flaslr as clearly shown in Figure l of the drawings. After suliicient sand has been inserted within the flask 22, a mold board 24 of suitable construction is placed upon the top surface of the sand and held in position by means of suitable clamps engaging opposite ends of the mold board. The swinging frame 16 is then moved to its upright position and air is admitted to the housing 1l below the ram 12 for moving the latter upwardly to cause the mold board 24 to engage the squeezer plate 14. In this connection it is to be noted that during upward movement of the ram toward the squeezer plate 14, the guia e members 26 projecting laterally'outwardly from opposite sides of the plate 13, engage cooperating guide members 2.7 secured to the innersides of the swinging frame members 16. The form of engagement is such that the frame` members 16 ,are ylocked in their upright position to insureproper engagement of the mold with the squeezer plate 14. After the ram 12 has been moved upwardly a sufficient distance to-compress the sand within the flask 22, the air in the housing 11 below the ram 12 is permit-ted to escape, thereby causing the` ram to descenda The ram is lowered until the guide members 26 disengage from their cooperating guide members 27 at which time the swinging frame members 16 l are swung tothe position shown in4 Figure 2 so as .to be out of the way for subsequent operations. The flask 22 ,is then inverted upon theplate 13 so as to position the pattern plate uppermost to permit withdrawal of the same from the sand. Upon completion of the inverting operation, the swinging framemembers 16 are again moved to their operative position and the ram 12 is again moved upwardly by admitting air into the housing 11. IWhen the ram has reached its uppermost position, as shown in Figure 4, theelements 19 are manipulated to engage beneath the ears 2O on the pattern plate and the ram is caused to descend at a relatively slow rate of speed with the result that the pattern will be withdrawn from. the sand. In this connection it is to be noted that the length of the guide members 27 is so determined that the cooperating guide members 2,6 will be maintained in engagement therewith during the descent of the ram to withdraw the pattern with the result that thie swinging frame members 16 will be held in a rigid positionrelative to the flask during the withdrawing operation.

Itwill be noted from the above operation of the molding machine that the mold must be inverted to permit drawing the pattern and if this operation is accomplished manually,

v considerable effort must be expended which not only retards production, but has a very detrimental effect upon the operator. It is, therefore, one of the essential features of this invention to provide simple and eflicient mechanism for facilitating the inversion of the mold. j

The mechanism employed `herein for accomplishing the above results comprises a pair of levers 30 pivotally mounted at their Alcwerends as at 31 upon opposite sides of the base of the machine and having their upper ends pivotally connected to the levers .32 as at The free endsjof the levers 32 are provided with upwardly opening recesses 34 for receiving suitable pintles 35 projecting laterally outwardly from opposite sides of the pattern plate 21." The engagement of the pintles 35V with the recessedportions of the levers 32 is such as to permit unrestricted rotation `of thepintles relative to the levers 32. Extending between the levers 32 and connected thereto is a tubular rod 36 having an arm 37 intermediate `,the ends thereof pivotally connected as at 38 to a fluidpressure cylinder v39 having la.V iston 40 therein permanently and rigidly Xed to the base of the machine through the intermediary of arod 41. The cylinder 39l communicates at the upper end thereof with a source of fluid under pressure controlled by a suitable valve 42. The arrangement is suoli that the admission of air into the cylinder 39 above the piston 40 causes the cylinder 39 to move upwardly relative to the piston and 4since the cylinder is connected to the levers 32 as shown in Figure 3, it necessarilyy follows that the levers 32 will also be moved upwardly. Upward movement of the free en ds of the levers 32 effects a corresponding movement of the mold assembly dueto the fact thatthe pintles 35 upon opposite sides ofthe pattern plate are engaged within the recessed portions of the levers 32. The partsare so designed that when the cylinder has moved to its uppermost position relative to the piston 40, the molding device including the flask and pat` tern plate is supported a sufficient distance above the ram to 'permit the device to be rotated so as to position Lthe pattern plate uppermost subsequent to the withdrawing of the'latter from the mold. It .will further be apparent from the above description that the fluid operated cylinder is connected to the levers 32 adjacent their pivotal connections 33 with the levers .30 so that the travel of the cylinder necessary to raise the mold the dcsired distance is reduced to the minimum.

In order torestrict upward movement lof the mold by the arms 32 to a rectilinear path in alignment with the path of movement of the ram 12, I provide a guide 43 upon one side of the housing for the ram and extending' parallel to the path of travel of the ram. The guide 43 is formed of a pair of flanged members 44 spaced apart a sufficient distance llo and from the ram ina predetermined Vrectilinear path. v Y Y 6. In a molding machine, a support for a mold forming device, power means foi' moving the device in spaced relation to the support to permit inverting the mold including a pair of levers having their free ends pivotally ccnnected to opposite sides of the device and fulcrumedat the opposite ends thereof, and means engageable with the levers adjacent the fulcrums thereof for moving the free ends of the levers and device carried thereby upwardly a sufficient distance to permit rotating the device to invert the mold. said means also operable to return the mold in its inverted position upon the support.

' 7., In a molding machine, a support for a mold forming device, means for automatically moving the device in spaced relation to the supportA to permit inverting the mold including a pair of levers having the free ends thereof adapted to be pivotally connected to opposite sides of the device and fulcrumed at the opposite ends thereoiliuidpressure means engageable with the leversa-t a point intermediate the ends thereof for moving the free endsV ofthe levers and device carried thereby upwardly a suflicient distance to permit rotating the device to invert the mold, and'means for restricting'movement of theV a pair of levers adapted to be pivotally connected to opposite sides of the pattern pla-te for supporting the same, fulcrums for said levers, and mechanical means engagingthe levers intermediate the endsI thereof for moving the same together with the' moldy away from the support a suiicient distance to permit inverting the'inold, said means also operable to return the mold in its inverted position upon the support,v and means for restricting movement of themold toward and from the support to a predetermined path.

9. In a molding machine, a support for a mold forming device, a pair of levers adapted to be pivotally connected tor opposite sides of the device, shiftable fulcrumsfor said levers, power means connected to said levers intermediate the ends thereof for moving the latter together with the device away from the of the free ends of the levers to a predetermined rectilinear path.

10. In a molding machine, a reciprocable iam adapted to support arnold forming device, a. pair of levers having the free end portions adapted to be pivotally connected ram for supporting va mold, fluid pressure means form'oving 'said mold away from the ram a sufficient distance to Ypermit inverting the mold and for subsequently returning thev mold in its inverted 'position upon the ram, and means for restricting movement of the mold toward and from the ram tothe path of travel of the latter.

12. In a molding machine, a support for a mold forming device, a pair of levers having the free end portions thereof adapted to 'be'pivotally conncctedto opposite sides of the device, sliiftable Vfulcrums for the oppo- Sie site ends of the levers, a member connecting said levers intermediate the ends thereof, power means engaging Vsaid member for moving the free end portions of thelevers about their fulcrums'and thereby effecting a movement of the device relative to the support, and means for. restricting moveinentof the device to a predetermined path relative to the support.

13. In a molding machine, a. support for a mold forming device, a pair of' levers having y the free end portions-pivotally connected to opposite sides of the device, fulcrumsfor the opposite'en'ds of the levers, and power means f connected to said levers intermediate the ends thereof for moving the latter as a unit about their fulcrums and thereby effecting a move-A ment of the device relative to its' support.

14. 'In a molding machine, a support for a mold forming device, apair of levers having the free ends adapted to beapivotally connected to the deviceat'oppositesides thereof,shiftable fulcrums for vthe opposite ends of the levers, power means for moving said levers about their fulcrums and ythereby effecting 'a movement of the device relative to its support, and means connected to one of theV fulcrums aforesaid foi-restricting movement ofk the free ends of the levers to a predetermined path relative to the support.

-15.` In a molding machine, the combination with a ram adapted to support a mold forming device having a 'pattern plate', of means pivotally engageable with the pattern plate for rotatably supporting the device in spaced relation to the ram, and power means engaging the means aforesaid for moving the device away from the ram a suficient distance to permit inverting the mold and for iis IBO

subsequently returning the inverted device to the ram.

i6. In a molding machine, a support for a melding device, linkage pivotally engageable with opposite sides 0i the device for supporting the same in spaced relation to the support to permit inverting the mold, and power means for actuatingl said linkage to mere the device relative to said support.

17. In a molding' machine, a reciprocable ram for supporting a mold forming' device, linkage pivotally connected to opposite sides oi.E the device for supporting the same in spaced relation to the rain to permit inverting the mold. power means connected to the linkage fer effecting movement of the mold forniing device toward and away from the ram, and means engaging said linkage t0 insure movement of the device in a predetermined path relative to the ram.

In testimony whereof I ailix my signature.

WILLIAM J. FIEGEL.

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